.App {
  transform-origin: left top;
  position: absolute;
  top: 0;
  left: 0;
  width: 1920px;
  height: 1080px;
  background-color: #0c1631;
  color: #fff;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
}

.header {

}

.section {
  display: flex;
}
.section>div {
  margin-left: 40px;
}
.section>div:nth-child(1), .section>div:nth-child(3){
  width: 400px;
}
.section>div:nth-child(2){
  width: 960px;
}
.header {
  display: flex;
  justify-content: center;
  align-items: center;
}
.headerTitle {
  display: flex;
  position: relative;
  height: 80px;
  width: 600px;
  margin-bottom: 20px;
}
.headerTitle span {
  position: absolute;
  text-align: center;
  width: 100%;
  font-size: 30px;
  font-weight: bold;
}
.headerTitle .headerBg {
  position: absolute;
  bottom: 0;
}
.headerTitle .headerBg:nth-child(2){
  left:0;
}
.headerTitle .headerBg:nth-child(3){
  right:0;
}